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Finding the Fourth Proportional to 39,356.80, 59,069.76 and 21,846.40

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Solution

The fourth proportional to 39,356.80, 59,069.76 and 21,846.40 is: 32,788.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,356.80 : 59,069.76 = 21,846.40 : x
  2. Step 2: Convert to fraction form
    39,356.80/59,069.76 = 21,846.40/x
  3. Step 3: Cross multiply
    39,356.80x = 59,069.76 × 21,846.40
  4. Step 4: Simplify right side
    39,356.80x = 1,290,461,604.86
  5. Step 5: Solve for x
    x = 1,290,461,604.86/39,356.80
  6. Step 6: Final answer
    x = 32,788.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.